at one time
1
一度, 从前
a systematic method of diagnosing a disorder (e.g., headache) that lacks unique symptoms or signs
3
曾经, 一度
at a specific point or period in the past
- At one time, this place was a bustling market.
曾几何时, 这个地方是一个繁华的市场。
- They were great friends at one time, but not anymore.
他们曾经是很好的朋友，但现在不再是了。
- At one time, the village had no electricity.
曾几何时，这个村庄没有电。
- At one time, she was the top scorer on the team.
曾几何时, 她是队里的头号得分手。
- The building was a school at one time, before it was abandoned.
这座建筑曾经是一所学校，后来被废弃了。